Duskwatch Headkeeper

Executioner spells you cast cost {1} less to cast.
{3}{b}, {t}: Exile three target cards from your
graveyard. Return up to one target creature card
from a graveyard to the battlefield under your
control. That creature gains haste. At the
beginning of the next end step, sacrifice it.
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"Fret not, little one. For once we have your
head, it will not go to waste.."